Added init/shutdown of the AsyncEventThread to enso_win32/__init__.py, because TransparentWindows can't be instantiated until the AsyncEventThread is running.
Added init/shutdown of the AsyncEventThread to enso_win32/__init__.py, because TransparentWindows can't be instantiated until the AsyncEventThread is running.

git-svn-id: b6fd099cd3d97ba56ca68c4d1ea7aaa6a131ba03@66 8b7adc99-b347-0410-ae0a-d9e86c8d69b5

roderyc/enso,roderyc/enso,roderyc/enso